关于动态添加控件后移除控件的问题。。。。
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
panel1.AutoScroll = true;

panel1.ControlRemoved += new ControlEventHandler( panel1_ControlRemoved );
}

void panel1_ControlRemoved( object sender , ControlEventArgs e )
{
System.Collections.IEnumerator enumerator = this.panel1.Controls.GetEnumerator();
int index = 0;
while ( enumerator.MoveNext() )
{
Control ctrl = (Control)enumerator.Current;
if ( index == 0 )
ctrl.Location = new Point( 0 , 0 );
else
ctrl.Location = new Point( 0 , ( index * ( 60 + 3 ) ) );
index++;
}
}
int height = 60;

private void button1_Click( object sender , EventArgs e )
{
Button btn = new Button();
btn.Width = panel1.Width-4;
btn.Height = height;

btn.BackColor = SystemColors.ButtonFace;
btn.Top = panel1.Controls.Count * height;
btn.Text = Convert.ToString( panel1.Controls.Count + 1 );
panel1.Controls.Add( btn );
btn.Click += new EventHandler( btn_Click );
}

void btn_Click( object sender , EventArgs e )
{
panel1.Controls.Remove( (Control)sender );
}
}
当点击button1添加多个button控件到panel中后，此时panel有滚动条，把滚动条拖到最低下，点击最后一个button移除后，再把滚动条往上拖到顶，就会发现空出来一大截，怎么让第一个控件到顶啊？

[解决办法]
在 panel1_ControlRemoved 方法内开始循环之前加上一句
panel1.VerticalScroll.Value = 0;
楼主你出现这样的问题应该是由于当前滚动条已经滚动到下方，这个时候设置location会从当前滚动条所处的最顶端位置开始算起。一些拙见。
[解决办法]
调用下panel的AdjustFormScrollbars方法看看

http://msdn.microsoft.com/en-us/library/system.windows.forms.scrollablecontrol.adjustformscrollbars.aspx